*{
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Popping', sans-serif;
}
section{
  position: relative;
  min-height: 100vh;
  background: #557085;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 20px;
  transition: 0.5s;
}
.active{
  background: #3e3f39;
}
section .container{
  position: relative;
  width: 728px;
  height: 500px;
  background: #fff;
  box-shadow: 0 15px 50px rgba(0, 0, 0, 0.1);
  overflow: hidden;
}
section .container .user{
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: flex; 
}
section .container .user .imgBx{
  position: relative;
  width: 50%;
  height: 100%;
  transition: 0.5s;
}
section .container .user .imgBx img{
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
section .container .user .formBx{
  position: relative;
  width: 50%;
  height: 100%;
  background: #fff;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 40px;
  transition: 0.5s;
}
section .container .user .formBx h2{
  font-size: 18px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 2px;
  text-align: center;
  margin-bottom: 10px;
  color: #555;
}
section .container .user .formBx input{
  width: 100%;
  padding: 10px;
  background: #f5f5f5;
  color: #333;
  border: none;
  outline: none;
  box-shadow: none;
  font-size: 14px;
  margin: 8px 0;
  letter-spacing: 1px;
  font-weight: 300;
}
section .container .user .formBx input[type="button"]{
  max-width: 100px;
  background: #677eff;
  color: #fff;
  cursor: pointer;
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 1px;
  border-radius: 5px;
  transition: 0.5s; 
}
section .container .user.signupBx .formBx input[type="button"]{
  background: #e73e49;
}
section .container .user .formBx .signup{
  position: relative;
  margin-top: 20px;
  font-size: 12px;
  letter-spacing: 1px;
  color: #555;
  text-transform: uppercase;
  font-weight: 300;
}
section .container .user .formBx .signup a{
  font-weight: 600;
  text-decoration: none;
  color: #577eff;
}


section .container .signupBx{
  pointer-events: none;
}
section .container.active .signupBx{
  pointer-events: initial;
}
section .container .signupBx .formBx{
  top: 100%;
}
section .container.active .signupBx .formBx{
  top:0;
}
section .container .signupBx .imgBx{
  top: -100%;
  transition: 0.5s;
}
section .container.active .signupBx .imgBx{
  top: 0;
}


section .container .signinBx .formBx{
  top: 0;
}
section .container.active .signinBx .formBx{
  top: 100%;
}
section .container .signinBx .imgBx{
  top:0;
  transition: 0.5s;
}
section .container.active .signinBx .imgBx{
  top: -100%;
}

@media (max-width: 991px){
  section .container{ max-width: 400px; }
  section .container .imgBx{ display: none; }
  section .container .user .formBx{ width: 100%; }
  section .container.active .signinBx .formBx{ top: -100%; }
}